Boiler prime preventer



Aug. '7, H93, 1&464225 J. H. STQCKHOLDER BOILER PRIME PREVENTER Aug. 7, MM5

J. Hl. STOCKHOLDE BOILER PRIME PREVENTER Filed May 26 '1921 2 Sheets-Sheet 2 Patented thug., 77, i223;

unir erre JUEN HENRY STUCJKHUJLDER, 03F NEW URLEANS, LUJISEANA.

BOJILER PRIME FREWENTEFU.

Application led May 26, i921. Serial No. 472,925.

To all whom t may concern.'

Be it known that ll, JOHN H. SirocnHoLnnn, a citizen of the United States, residing at New rleans, in the county of Orleans, State of Louisiana, have invented a new and useful Boiler Prime Freventer; and l .do hereby declare the following to be a full, clear, and exact'description ot the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to, prime preventers and has for its object to provide a device of this character wherein a boiler will be prevented from priming and float controlled in such a manner that when the water in the boiler falls to its lowest level the steam ted to the boiler feed pump will be increased, thereby accelerating its action and causing a greatervolume of water to be fed to the boiler. Also to provide ports whereby when the Hoet is in an intermediate position the valve will be closed and the boiler will have sullicient water.

A further object is to provide a valve with ports whereby when-the heat is in its highest position as when the boiler is priming ports of the valve will be opened, automatically allowing discharge of impurities which cause the water in the boiler to loam and prime and at the same time providing means for supplying steam to the feed pump for accelerating its action and giving a greater volume ot' water to the boiler.

A further object is to provide -perforated members adjacent the water level and the bottom of the boiler, said members being connected together by a vertical pipe, which vertical pipe is provided with a discharge pipe, by means ot which discharge pipe scum from the top of the water may be disposed from the boiler and sediment in the bottom of the boiler discharged.

lllith the above and other obiects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

ln the drawings Figure l a vertical sectional view through one end of a conventional form oi boiler, showing the prime preventing device applied thereto.

Figure l is a vertical sectional view taken i on line l-fi oit Figure 2.

Figure 5 is a horizontal longitudinal sectional view through a portion oit the upper skimming member.

Figure 6 is a vertical longitudinal sectional view through the lower sediment removing pipe. A

Figure 7 is a sectional view through the skimming pipe taken on line 7 7 of Figure l.

Figure 8 i is a vertical sectional view through the sediment removing pipe.

Referring to the drawings, the numeral l designates a conventional form of boiler, and 2 an apertured pipe disposed adjacent the bottom thereof. The pipe 2' extends through the end wall 3 of the boiler and then extends upwardly thereby providing thel vertically disposed portion d. Disposed within the boiler l at a point substantially the same as the normal water level of the boiler is a skimming pipe 5, which shimming pipe is provided with oppositely disposed apertures 6 through which foam and scum may pass into the pipe 5 during a skimming operation and from which pipe 5 to the pipe 2 through the vertically disposed pipe 7, which pipe connect.: Hm, gkimming pipe 5 and the sediment removing pipe 2 together. rllhe sediment removing pipe 2 is provided on its under side with elongated apertures 8, through which apertures sediment within the bottom ol the boiler will pass during a boiler cleaning operation. Extending outwardly from the vertically disposed pipe l is a discharge pipe 9, which discharge pipe is provided with a valve l0, and said valve when opened allows the pressure within Athe boiler to force the scum from the surface of the water through the apertures 6 in the pipe 5 and the sediment within the bottom of the boiler through the apertures 8 in the pipe 2. Secured to the upper end of the pipe t is a valve casing il., in which valve casing a cylindrically shaped member l2 is rochably mounted. @ne end of the inner member of the valve entends through the wall 3 of the boiler at a point above the normal water level therein and has lill) lll) connected to its end a float controlled arm 13 provided with a float 14. It will be seen that as the Water rises and falls within the .boiler that the valve member 12 will be rocked through the medium of the float 14.

Referring to Figure 2 wherein the valve member 12 has been rotated to the position it assumed when the boiler is priming and the float has passed its intermediate point and moved upwardly at which time the boiler is priming by reason of im urities in the water which causes foam. hen the float and consequently the valve has been moved to this position by the action of the water in the boiler, ports 15 and 16 are -in registration and also ports 17 and 18. When place of the foam and impurities that have causing a the ports are so positioned the foam will pass from the boiler and upwardly through the pipe 4, ports 15 and 16 and discharge pipe 19, thereby discharging impurities from the boiler which cause the water to foam andthe boiler to prime. At the same time priming is being prevented, steam is being admitted to the feed pump, through the registering ports 17 and 18 thereby acceleratmg its action and giving a greater volume of water to the boiler to take the been discharged.

' When the float is in an intermediate position at which time the boiler has sufficient water all ports are closed, however when the water in the boiler falls to its lowest level the float will open and move into registration the ports 20 and 21 in the-valve member 12 and valveA casing 11, thereby giving additional steam to the boiler feed pump 22, and accelerating its action and reater volume of water to be fed to the boiler and consequentl. causing the water level therein to rise until7 the float assumes its intermediate position with all of theports closed.

The valve casing and valve is shown as disposed outside the boiler, however it is to v be understood that the entire mechanism with the exception of the discharge pipe and pipes leading to the feed pump and designated by the numeral 22 may be disposed within the boiler.

From the above it will be seen that a prime preventer is provided for a boiler which is simple in construction, and one wherein the water within the boiler will be maintained at a uniform level, at all times. It will also be seen that the water may be skimmed and the sediment removed from the bottom of the boiler whenever desired and simultaneously.

The invention having been set forth what is claimed as new and useful is The combination with a boiler having a feed pump in connection therewith for supplying the boiler with water, of a float controlled valve in connection with said boiler, apertured pipes connected to said valve and disposed within the boiler, one of said ipes being disposed adjacent the water leve the other apertured pipe being disposed adjacent the bottom of theboiler, said fioat controlled valve formin means whereby the water within the boller may be skimmed and the sediment in the bottom of the boiler removed, said float controlled valve being so constructed that when the water drops be'low normal level steam will pass through said valve to the feed pump for accelerating its action and when the water rises above normal level the valve will open a discharge pipe thereby preventing priming of the boiler and at the same time admittlng steam to the feed pump for feeding water to the boiler. i

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN HENRY STOCKHOLDER. Witnesses:

F. W. ABEL, M. VON BEHREN. 

